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Finding the Fourth Proportional to 840.52, 1,159.81 and 481.60

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Solution

The fourth proportional to 840.52, 1,159.81 and 481.60 is: 664.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.52 : 1,159.81 = 481.60 : x
  2. Step 2: Convert to fraction form
    840.52/1,159.81 = 481.60/x
  3. Step 3: Cross multiply
    840.52x = 1,159.81 × 481.60
  4. Step 4: Simplify right side
    840.52x = 558,564.50
  5. Step 5: Solve for x
    x = 558,564.50/840.52
  6. Step 6: Final answer
    x = 664.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.